How to make a block script, where you the block attaches to your model?

Im trying to make a script for an Iron Man game, and I need to block to practically fly over to my character and cover my character. One, I need to know where the script needs to go, two, how to get the object/block to attach and stay on my roblox avatar until prompted by a hotkey to eject, three, how to set all of that up on a hotkey, so when I push a button the block would come and connect to me, and still allowing me to move.